Closed-Circuit Current Measurement: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 335is, 2013 BMW 335i, 2012 BMW 335is, 2012 BMW 335i, and 2011 BMW 335is. However, it is still accessible from the selected car via links, so may be relevant.
Sporadically or continuously, an increased closed-circuit current can occur in the parked vehicle. Possible causes for that may be:
- An additional current consumer is connected to terminal 30 or the battery.
- Defective components, control units or control unit peripherals using too much power in sleep mode and preventing the vehicle entering sleep mode
- Automatic detection of the cause is not possible in the case of a closed-circuit current fault. On vehicles with an intelligent battery sensor, only the range of the quiescent current can be determined:
- Quiescent current less than 80 mA
- Quiescent current between 80 and 200 mA
- Quiescent current between 200 mA and 1 A
- Quiescent current above 1 A
Conclusions can be drawn as to the component causing the fault based on the amount by which the quiescent current limit is exceeded.